We gave them to Saudi Arabia, to the United States, the Germans, French and British, all of them.

They have listened to all the conversations in them.

They know.

There is no need to distort this issue, they know for certain that the killer, or the killers, is among these 15 people." Khashoggi, a critic of de facto Saudi ruler Prince Mohammed bin Salman, was killed in Saudi Arabia's Istanbul consulate last month.

Erdogan said the hit was ordered at the "highest levels" of the Saudi government - something it denies.

His killing provoked global outrage but there's been little concrete action by world powers against Saudi Arabia, the world's largest oil exporter and a supporter of Washington's plans to contain Iranian influence across the Middle East.

CIA director Gina Haspel heard an audio recording of Khashoggi's death when she visited Istanbul, two sources told Reuters last month.

Erdogan did not give details of the contents of the tapes on Saturday but two sources have told Reuters they include the killing itself and conversations pre-dating the operation.

Erdogan repeated a demand for information on the whereabouts of Khashoggi's body.